Riku is the slightly older of the two twin sisters

yes!
you're right!
you don’t need a reason to love someone…
...
anyway...
it was nice...

very cute!
but... riku is the older twin. risa is the imouto (the younger sister)

that was great!

put a follow-up!

Good, but his first name is Daisuke while his last name is Niwa.

uhmm in the beginning it says niwa has always loved her older sister risa... i was very confused about that... and i still dont get. btw risa is the younger one